Hey There ...

I was referred to GBook by iPower.com and think it sounds lovely.

In reading the info I found several typos and I'm guessing you aren't a native English speaker.

In the text:

Visitors can even post private guest book messages which only you can read! This guestbook comes with IP banning, XHTML valid code, a bad words filter which replaces all bad words with **** in new posts and a secuirty switch which prevents floading (submiting the same message multiple times in your guest book)!

... there are several spelling mistakes:  security, flooding, and submitting.

You also used the word "which" three times and each time should have used "that".

Don't feel bad, many native speakers don't know why they pick the right one but here is a quick primer:  "Which" is used when the phrase is parenthetical and usually set apart with a comma.  "That" is used when the phrase is essential to the discussion and is never set apart with a comma.

An example:

"She opened the door, which was green."  The fact that the door was green is incidental.

"She opened the door that was green."  This implies that she had a choice of doors and deliberately chose the green one.

In the section ...

JunkMarkTM SPAM filter is designed to block those spammers who actually visit your guestbook and get pass the security number verification! A unique SPAM-fighting tool, give it a test!

... you use "get pass" instead of "get past":  One can pass security but one must get past security.  An idiom that would be hard to detect if you are listening to spoken English.

For consistency:  Sometimes you spell guestbook as a single word and sometimes as two.  Sometimes you spell it Gbook and sometimes GBook.

I am not trying to be picky ... All of this is my offering to support your mission since I have been laid-off for 4 months now and can't buy you a beer!

Have a great day and keep up the good work!

   -- Sunny (Maverick Grammarian)